Question: 4.15 ( ) Show that the Hessian matrix H for the logistic regression model, given by (4.97), is positive definite. Here R is a diagonal

4.15 ( ) Show that the Hessian matrix H for the logistic regression model, given by

(4.97), is positive definite. Here R is a diagonal matrix with elements yn(1 − yn), and yn is the output of the logistic regression model for input vector xn. Hence show that the error function is a concave function of w and that it has a unique minimum.

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